Aircraft // Arriel 2S1 HMU for sale

Arriel 2S1 HMU for sale

The Arriel 2S1 HMU (Hydro-Mechanical Unit) is a fuel control component designed for the Arriel 2S1 turboshaft engine by Safran Helicopter Engines. It regulates fuel flow from the pump to the combustion system, using a metering valve, pressure control, and stepper-motor input from the engine control system to maintain stable power and rotor speed. The HMU integrates mechanical backup control for safe operation if electronic control is lost and is critical for starting, acceleration, and engine protection. It is commonly supplied as an overhauled or serviceable aviation part for maintenance, repair, or replacement applications in helicopter fleets.